You can't find steps 8 to 12? Some people like to make unconventional paths for the steps around the pages. So look at the bottom of the second page of the diagrams; you'll find the missind steps there. The second page goes from the bottom up.

I'm stuck on step 13. I don't speak Spanish so I'm relying on Google Translate, which says something like "remove the queue". I don't understand what to do here - how does it get from step 13 to 14, where you can see color again on the tail?